6D Demonstration Experiment MANX

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6D Demonstration Experiment (MANX)

• Katsuya Yonehara
• Accelerator Physics Center, Fermilab

2
Goals in 6D demo experiment

• Verify emittance exchange 6D cooling theories
• Appeal technological availablity (find its
  boundaries)
• Test physics model
• Optimization

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Aim of MANX

• MANX is a proof-of-principle experiment
• Six dimensional helical cooling theory
• Demonstrate 6D cooling, Continuous emittance
  exchange, Exceptional cooling performance
• MANX can be a prototype cooling magnet for muon
  colliders
• MANX can be used as a pre-cooler.
• Or embed RF cell in MANX and test as a
  substructure of real HCC

4
Apply MANX for Pre-cooler
D. Neuffer, C. Yoshikawa

• Use LiH plate in this design
• Good transmission (gt 90)

10k POT
z 3 m
z 0 m
z 6 m
p (MeV/c)
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Tips in MANX

• Use liquid helium (LHe) as absorber
• No big safety issue
• Thin windows at both ends of channel
• No RF cavity inside HCC
• Save RD time money
• Momentum dependent (z-dependent) field map

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Overview of original MANX
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Simulation in best cooling option

• 6D cooling factor 2
• Transverse/longitudinal cooling factor 1.3
• Not perfect/Need more tuning

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Field error study

• Apply random errors in each component
• Need to investigate the field errors caused by
• misalignment of the HS coils

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MANX RD

• Helical magnet
• Mechanical analysis, Cryogenics, Quench
  protection
• Matching magnet
• Optimization
• Cooling option
• Best cooling (equal cooling), longitudinal only
  cooling, isochronous condition
• Spectrometer design
• Reduce systematic error
• Muon beam production line
• MTA, MiniBooNe, MTest, Pbar source

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HS for Cooling Demonstration Experiment
V. Kashikhin, A. Zlobin, M. Lamm, S. Kahn, M.
Lopes
Goals cooling demonstration, HS technology
development Features SSC NbTi cable, Bmax6 T,
coil ID 0.5m, length 10m

• Status conceptual design complete
• solenoid
• matching sections
• Next engineering design
• mechanical structure
• field quality, construction tolerances
• cryostat
• powering and quench protection

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Preliminary optics design in MTA
MTA
Diagnostic sections
Transport line
HCC
180º dispersion free bend
Decay channel
400MeV Linac
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Cooling option
Blue Red longitudinal only cooling Magenta
Green equal cooling
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Cooling option (contd)
Longitudinal only cooling can be made when the
dispersion factor satisfies,
This leads zero helical dipole field on the
reference orbit.
It is difficult to make a matching in this field
configuration.
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Is it possible to apply longitudinal only cooling?
This design has a large flexibility.
It may be possible to generate the longitudinal
only cooling in the new HS coil configuration.
We may also be able to reproduce the
isochronous helical channel by adjusting the
dispersion function.
Primary HS coil
Solenoid coil
This will be investigated soon.
Correction HS coil
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Phase approach

• Make a helical magnet with correction coils
• m beam test with LHe without RF
• Test cooling option
• Test LiH wedge absorber
• Embed RF in the helical magnet
• Test HPRF in HCC

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Detector design

• Basic spectrometers in upstream and downstream of
  MANX channel
• Suppressing systematic error is one of most
  difficult issues in this experiment (i.e. beam
  loss, accidental, etc)
• Particle tracking in cooling section would
  significantly reduce the systematic errors
• This tracker can also be uses as a spectrometer
  in HCC

We need further study of systematic error very
soon.
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Summary

• Preliminary simulation study has been done
• Design/make HS coil
• Demonstrate cooling option in simulation